Quote Originally Posted by Louis Charles Bruckner View Post
Best is a 10% solution of clorox and water. and rinse out with a mixture of over dosed de-chlorinator and tap water.
3X the normal dose for 1 gallon,

and then rinse with plain de Chlorinated water

let sit over night dry and see if you still smell any clorox
if there is any hard water stains a paper towel damped with white vinegar will do the trick
and that will kill just about any bug.
If this filter has been sitting dry for some time a simple rinse will suffice. No know fish diseases can survive total dryout.